package vashion.azeroth.common.encrypt;


import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Md5Encrypt {

	private static final char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6',
			'7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

	public  static final String encrypt(String text, String charSet) {
		if(null == text || text.equals(""))
			return "";
		MessageDigest msgDigest = null;
		try {
			msgDigest = MessageDigest.getInstance("MD5");
		} catch (NoSuchAlgorithmException e) {
			throw new IllegalStateException("System doesn't support MD5 algorithm.");
		}
		//charSet为null时，不重新编码
		if(charSet != null){
			try {
				msgDigest.update(text.getBytes(charSet)); //注意该接口是按照utf-8编码形式加密
			} catch (UnsupportedEncodingException e) {
				throw new IllegalStateException("System doesn't support your  EncodingException.");
			}
		}
		
		byte[] bytes = msgDigest.digest();
		return new String(encodeHex(bytes));
	}
	
	/**
	 * 对字符串进行MD5加密  默认为UTF-8编码
	 * @param text 明文
	 * @return 密文
	 */
	public  static final String b64(String text) {
		return encrypt(text, "UTF-8");
	}

	private static final char[] encodeHex(byte[] data) {
		int l = data.length;
		char[] out = new char[l << 1];
		// two characters form the hex value.
		for (int i = 0, j = 0; i < l; i++) {
			out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];
			out[j++] = DIGITS[0x0F & data[i]];
		}
		return out;
	}
	
//	public static void main(String[] args) throws UnsupportedEncodingException {
//		String str1 = URLEncoder.encode("dingding|1|anquan_happy@163.com| |丁海莉|330683198604223528|10|||TYTEY!@#%$#>!@##$$OIUGVCX>!@#$", "UTF-8").toUpperCase();
//		System.out.println(str1);
//		String str2 = "DINGDING%7C1%7CANQUAN_HAPPY%40163.COM%7C%7C%E4%B8%81%E6%B5%B7%E8%8E%89%7C330683198604223528%7C10%7C%7C%7CTYTEY%21%40%23%25%24%23%3E%21%40%23%23%24%24OIUGVCX%3E%21%40%23%24";
//		System.out.println(str2);
//		System.out.println(str1.equals(str2));
//		System.out.println(encrypt(str1, "UTF-8"));
//		System.out.println(encrypt(str2));
//	}
}